Following your dog around while waiting for it to urinate will probably cause it to get jumpy and worried. Be patient and don’t get too close, but once your dog goes to the toilet, slide the cup or saucer under the stream of urine. If necessary, use the dowel rod to slide the cup into place from a distance. It can be messy, but you should get enough urine for testing. Use the dropper or pipette to transfer the urine into the sealable container.